Parallel transfer pipeline type rainwater pretreatment device

Abstract

The utility model discloses a parallel transfer pipeline formula rainwater pretreatment device, include: inlet pipeline, direct discharge pipeline, pretreatment pipeline and outlet pipeline, among them: the first water quality detection equipment is equipped with in the inlet pipeline department, the inlet pipeline with direct discharge pipeline with the pretreatment pipeline intercommunication, direct discharge pipeline with the first gate valve is equipped with in the inlet pipeline junction, direct discharge pipeline with the pretreatment pipeline parallelly arranged, the pretreatment pipeline with the second gate valve is equipped with in the inlet pipeline junction, and the pretreatment pipeline is in order to set up the grid module, biological contact oxidation module, activated carbon filter module, the outlet pipeline intercommunication direct discharge pipeline with the end of pretreatment pipeline, and second water quality detection equipment is set up on the outlet pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of rainwater treatment technology, specifically relating to a parallel transfer pipeline-type rainwater pretreatment device. Background Technology

[0002] With the continuous advancement of urbanization in my country, water resource and water environment problems in many cities are becoming increasingly prominent. Among these, the deterioration of water bodies and the water environment caused by rainwater runoff are becoming increasingly evident. The main reason is the significant changes that have occurred to the urban underlying surface during decades of construction, leading to the deposition and accumulation of various pollutants. These surface pollutants are washed into surface water bodies by rainwater runoff, causing water pollution. During heavy rainstorms, the runoff volume is large, the pollution level is high, and the eventuality is sudden, placing immense pressure on end-of-pipe wastewater treatment plants. Therefore, it is necessary to develop a device that pre-treats rainwater during its transport to reduce pollution levels and alleviate the overload on end-of-pipe wastewater treatment plants. Utility Model Content

[0003] This utility model proposes a parallel transfer pipeline-type rainwater pretreatment device, the purpose of which is to pre-process the rainwater. The rainwater is treated during the transfer process in the pipeline and then discharged to the surface water body through the rainwater pump station, so as to reduce the treatment pressure of rainwater entering the sewage pipe network and the pollution caused by direct discharge into the surface water body.

[0004] To achieve the above technical solution, the present invention adopts the following technical solution:

[0005] A parallel-connection pipeline-type rainwater pretreatment device includes: an inlet pipe, a direct discharge pipe, a pretreatment pipe, and an outlet pipe; wherein: a first water quality testing device is installed at the inlet pipe, and the inlet pipe is connected to the direct discharge pipe and the pretreatment pipe; a first gate valve is installed at the connection between the direct discharge pipe and the inlet pipe; the direct discharge pipe and the pretreatment pipe are connected in parallel; a second gate valve is installed at the connection between the pretreatment pipe and the inlet pipe; a bar screen module, a biological contact oxidation module, and an activated carbon filter module are sequentially installed inside the pretreatment pipe; the outlet pipe connects the ends of the direct discharge pipe and the pretreatment pipe, and a second water quality testing device is installed on the outlet pipe.

[0006] Preferably, the biological contact oxidation module includes: two support perforated plates, which are respectively disposed at the end of the grid module and before the activated carbon filter module to form a accommodating cavity in the pretreatment pipeline; and MBBR packing material, which fills the accommodating cavity.

[0007] Preferably, the activated carbon filtration module contains activated carbon granular filter media with a particle size of 3 mm.

[0008] Preferably, a flow control valve is provided on the pretreatment pipeline and downstream of the second gate valve.

[0009] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0010] 1. This device has a parallel structure, allowing it to either enter the pretreatment pipeline or be discharged through a direct discharge pipeline depending on the degree of rainwater pollution at different times. The gate valve and flow regulating valve provide selectivity for the overall flow capacity of the device.

[0011] 2. In the biological contact oxidation module area of ​​this device, the principle of dissolved oxygen diffusion concentration gradient is used to naturally form different microbial growth environments. The biofilm is naturally renewed and shed, with almost no residual sludge, no sludge bulking problem, strong resistance to shock loads, and stable effluent quality.

[0012] 3. In the biological contact oxidation module of this device, the interior is filled with MBBR packing material, which has a hollow structure and is suspended in the water. Anaerobic bacteria grow inside the packing material to carry out denitrification to remove nitrogen. Aerobic bacteria grow on the outside to remove organic matter. Nitrification and denitrification occur simultaneously throughout the entire process. This improves the efficiency of the biological reaction and reduces the space required.

[0013] 4. The activated carbon filtration module in this device is equipped with 3m particle size granular activated carbon filter media. Granular activated carbon has a huge specific surface area and well-developed pore structure. In addition to intercepting suspended matter, it can also adsorb and remove odor substances and organic matter, and has a reliable removal effect on heavy metal ions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of one embodiment of the present invention;

[0015] Figure 2 This is a cross-sectional view of the biological contact oxidation module of this utility model. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] See Figure 1 As shown, the main components of the parallel transfer pipeline-type rainwater pretreatment device include an inlet pipe 1, a pretreatment pipe, a direct discharge pipe 11, and an outlet pipe 12. Each pipe is an independent and detachable pipe, connected in parallel or series sequentially, and connected by flanges. The pretreatment pipe includes a bar screen module 5, a biological contact oxidation module 7, and an activated carbon filter module 9.

[0018] The inlet pipe 1 is connected to a rainwater pipe at its front end, and a first water quality monitoring device 21 is installed externally. It then connects in parallel to a pretreatment pipe and a direct discharge pipe 11 in two directions. A first gate valve 31 is installed at the beginning of the direct discharge pipe 11 to control its inlet water. A second gate valve 32 and a flow control valve 4 are installed at the beginning of the pretreatment pipe to control its inlet water and flow rate. A bar screen module 5 is connected after the valves to block suspended solids, intercepting and removing larger suspended and floating objects from the rainwater. Subsequently, a biological contact oxidation module 7 is connected, with support plates 6 at both ends to ensure the fixation of the internal MBBR packing material 8. The three-dimensional, multi-faceted structure of the packing material ensures the attachment and growth of microorganisms. Utilizing the principle of oxygen mass transfer resistance, a concentration gradient can naturally form within the narrow pipe cavity, providing anaerobic, anoxic, and aerobic microbial growth environments respectively, ensuring the effectiveness of biological treatment. Biological contact oxidation does not have the problem of sludge bulking; the biofilm naturally renews and detaches, making maintenance and management easy, and the treatment effect is stable. The system then connects to activated carbon filtration module 9, which contains uniform granular activated carbon packing material with a particle size of 3mm to adsorb and filter residual pollutants. This process filters and adsorbs most of the remaining organic matter, decolorizes, and deodorizes. Afterward, the direct discharge pipe 11 merges with the pretreatment pipe and connects to the effluent pipe 12. The effluent pipe 12 has an external second water quality monitoring device 22 for real-time monitoring of the effluent water quality.

[0019] During rainfall, rainwater collects from surface rainwater wells and enters the device. The inlet module 1 guides the flow, and the first water quality monitoring device 21 analyzes the pollution level of the inlet water. When the pollution level is low, the first gate valve 31 at the beginning of the direct discharge pipe 11 is opened, and the second gate valve 32 of the pretreatment pipe is closed. The rainwater is discharged directly through the direct discharge pipe 11 into the outlet pipe 12 without further treatment. When the pollution level is high, the second valve 32 of the pretreatment pipe is opened, and the first valve 31 of the direct discharge pipe 11 is closed. Simultaneously, the flow control valve 4 is adjusted to ensure a suitable flow rate. The rainwater passes through the bar screen module 5 to remove suspended solids, enters the biological contact oxidation module 7 to reduce COD, TP, TN, NH4+, etc., and further adsorbs and filters organic pollutants and inorganic particles through the activated carbon filter module 9. Finally, it flows out through the outlet pipe 12. The effluent quality of the device meets or exceeds the Class II water quality standard of GB5749-2022.

[0020] This device integrates rainwater treatment and transportation functions, achieving simultaneous transportation and treatment. It improves time efficiency while also reducing the space required for the entire process, offering dual benefits in terms of both time and space. Furthermore, it is easy to install, has high treatment efficiency, and low operating costs, making it suitable for areas with high rainwater treatment loads.

[0021] The embodiments described above are for illustrative purposes only and are not intended to limit the scope of this utility model. All equivalent changes and modifications made to this utility model by those skilled in the art should fall within the scope of the appended claims.

Claims

1. A parallel transfer pipeline-type rainwater pretreatment device, characterized in that, include: Inlet pipe, direct discharge pipe, pretreatment pipe and outlet pipe; among which: The inlet pipe is equipped with a first water quality testing device, and the inlet pipe is connected to the direct discharge pipe and the pretreatment pipe. A first gate valve is provided at the connection between the direct discharge pipe and the inlet pipe; the direct discharge pipe and the pretreatment pipe are connected in parallel. A second gate valve is provided at the connection between the pretreatment pipeline and the inlet pipeline. A grid module, a biological contact oxidation module, and an activated carbon filter module are sequentially installed inside the pretreatment pipeline. The outlet pipe connects the end of the direct discharge pipe and the pretreatment pipe, and a second water quality testing device is installed on the outlet pipe.

2. The parallel transfer pipeline rainwater pretreatment device according to claim 1, characterized in that, The biological contact oxidation module includes: Two support plates are respectively disposed at the end of the grid module and before the activated carbon filter module to form a receiving cavity in the pretreatment pipeline; MBBR packing material is used to fill the accommodating cavity.

3. The parallel transfer pipeline rainwater pretreatment device according to claim 2, characterized in that, The activated carbon filtration module is equipped with activated carbon granular filter media with a particle size of 3mm.

4. The parallel transfer pipeline rainwater pretreatment device according to claim 1, characterized in that, A flow control valve is provided on the pretreatment pipeline and downstream of the second gate valve.

Images